Dont check packages with ignore_dependencies

src/pip/_internal/operations/check.py

@@ -100,7 +100,9 @@ def check_install_conflicts(to_install: List[InstallRequirement]) -> ConflictDet
     # Start from the current state
     package_set, _ = create_package_set_from_installed()
     # Install packages
-    would_be_installed = _simulate_installation_of(to_install, package_set)
+    would_be_installed = _simulate_installation_of(
+        list(filter(lambda x: not x.ignore_dependencies, to_install)), package_set
+    )
 
     # Only warn about directly-dependent packages; create a whitelist of them
     whitelist = _create_whitelist(would_be_installed, package_set)

src/pip/_internal/req/constructors.py

@@ -403,7 +403,7 @@ def install_req_from_line(
         install_options=options.get("install_options", []) if options else [],
         global_options=options.get("global_options", []) if options else [],
         hash_options=options.get("hashes", {}) if options else {},
-        ignore_dependencies=options.get("ignore_dependencies", False)
+        ignore_dependencies=options.get("ignore_dependencies", ignore_dependencies)
         if options
         else ignore_dependencies,
         constraint=constraint,

src/pip/_internal/req/req_file.py

@@ -190,8 +190,6 @@ def handle_requirement_line(
         if options:
             # Disable wheels if the user has specified build options
             cmdoptions.check_install_build_global(options, line.opts)
-            if line.opts.ignore_dependencies:
-                options.ignore_dependencies = True
 
         # get the options that apply to requirements
         req_options = {}

src/pip/_internal/resolution/resolvelib/candidates.py

@@ -117,6 +117,7 @@ def _make_install_req_from_dist(
             install_options=template.install_options,
             global_options=template.global_options,
             hashes=template.hash_options,
+            ignore_dependencies=template.ignore_dependencies,
         ),
     )
     ireq.satisfied_by = dist

src/pip/_internal/resolution/resolvelib/provider.py

@@ -234,10 +234,9 @@ def is_satisfied_by(self, requirement: Requirement, candidate: Candidate) -> boo
 
     def get_dependencies(self, candidate: Candidate) -> Sequence[Requirement]:
         install_req = candidate.get_install_requirement()
-        if install_req:
+        with_requires = not self._ignore_dependencies
+        if install_req and with_requires:
             with_requires = not install_req.ignore_dependencies
-        else:
-            with_requires = not self._ignore_dependencies
         return [r for r in candidate.iter_dependencies(with_requires) if r is not None]
 
     @staticmethod